CN217934003U - Power battery top cover structure - Google Patents
Power battery top cover structure Download PDFInfo
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- CN217934003U CN217934003U CN202220388252.6U CN202220388252U CN217934003U CN 217934003 U CN217934003 U CN 217934003U CN 202220388252 U CN202220388252 U CN 202220388252U CN 217934003 U CN217934003 U CN 217934003U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application relates to a top cover structure of a power battery, which comprises a top cover plate, a positive pole post assembly, a negative pole post assembly and a lower plastic sheet; the two ends of the top cover plate are symmetrically provided with a positive pole column hole and a negative pole column hole; the anode pole post assembly is arranged in the anode pole post hole, and the cathode pole post assembly is arranged in the cathode pole post hole; the top cover plate is arranged on the lower plastic sheet and is abutted against the lower plastic sheet; a first hole and a second hole are symmetrically formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole; the positive pole post assembly comprises a positive upper pole post and a positive lower pole post which are arranged up and down; a first insulating washer is arranged between the positive upper pole and the top cover plate; and a first sealing ring is arranged on the inner side surface of the first hole, and the first insulating gasket is abutted against the first sealing ring. This application has reduced the height of utmost point post, and the leakproofness is good, and the cost is lower.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a power battery top cap structure.
Background
With the development of science and technology, lithium batteries are attracting more and more attention as an energy device and are widely applied to the fields of mobile phones, electric automobiles, electric tools and the like.
The lithium ion battery has various top cover pole column structures, a top cover pole column is integrally arranged, and the pole column is independently arranged as a component and then welded on the top cover sheet to form a complete top cover structure. At present, in the existing lithium battery top cap terminal post structure, the negative electrode terminal post of the lithium battery adopts oxygen-free red copper completely, and the negative electrode terminal post of the lithium battery is welded on an aluminum post through a friction welding mode and then machined to be in a qualified size. In any mode, the cost is high, and the top cover is complex in structure and lacks of cost advantage; in addition, the height of the pole of the prepared top cover structure is high, the space utilization rate of the battery is reduced, the standard requirement of the test is difficult to meet, the sealing performance is poor, and the use stability of the lithium battery is easily influenced.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a power battery top cap structure aims at solving the problem that power battery top cap structure is complicated, the cost is higher, space utilization is less, the leakproofness is relatively poor etc. The utility model provides the very big height that has reduced utmost point post has effectively increased the space utilization of battery, has better reliability, simple structure moreover, and the leakproofness is good, and the cost is lower, can regard as the commodity to produce and use.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a top cover structure of a power battery is used for a square shell battery and comprises a top cover plate, a positive pole post assembly, a negative pole post assembly and a lower plastic sheet;
the two ends of the top cover plate are symmetrically provided with a positive pole column hole and a negative pole column hole; the positive pole post assembly is arranged in the positive pole post hole, and the negative pole post assembly is arranged in the negative pole post hole;
the top cover plate is arranged on the lower plastic sheet and is abutted against the lower plastic sheet; a first hole and a second hole are symmetrically formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole;
the positive pole post assembly comprises a positive upper pole post and a positive lower pole post which are arranged up and down; a first insulating washer is arranged between the positive upper pole column and the top cover plate, the first insulating washer is sleeved in the positive pole column hole, and the positive upper pole column penetrates through the first insulating washer and is connected with the positive lower pole column in an abutting mode; a first sealing ring is arranged on the inner side surface of the first hole, and the first insulating gasket is abutted with the first sealing ring; the positive lower pole column penetrates through the first sealing ring and is connected with the positive upper pole column in an abutting mode.
In this application, through setting up anodal utmost point post into the anodal utmost point post of going up and down the utmost point post just that sets up from top to bottom, can effectively reduce the height of anodal utmost point post, and then effectively increase the space utilization of battery. Through setting up first insulating washer and first sealing washer, can guarantee the leakproofness and the reliability of structure.
Further, the negative pole post assembly comprises a negative upper pole post and a negative lower pole post which are arranged up and down; a second insulating washer is arranged between the negative upper pole column and the top cover plate, the second insulating washer is sleeved in the negative pole column hole, and the negative upper pole column penetrates through the second insulating washer and is connected with the negative lower pole column in an abutting mode; a second sealing ring is arranged on the inner side surface of the second hole, and the second insulating gasket is abutted with the second sealing ring; the negative lower pole column penetrates through the second sealing ring and is connected with the negative upper pole column in an abutting mode.
In this application, through set up negative pole post and the negative pole post down on the burden that sets up from top to bottom with negative pole post, can effectively reduce negative pole post's height, further effectively increase the space utilization of battery. Through setting up second insulating washer and second sealing washer, can guarantee the leakproofness and the reliability of structure.
Further, the positive upper pole is connected with the positive lower pole in a welding manner; the negative upper pole column is connected with the negative lower pole column in a welding mode. In this application, through just going up utmost point post and just utmost point post down, utmost point post and the utmost point post welded connection under the negative, leakproofness, reliability and the stability of assurance structure that can be fine.
Further, the positive upper pole, the positive lower pole and the negative upper pole are all poles obtained by aluminum coil stamping.
Further, the negative lower pole is a pole obtained by stamping a copper-aluminum composite coil material. In the application, the pole part is formed by stamping a coil material, the preparation efficiency is high, and the material cost is low.
Furthermore, an explosion-proof valve hole is arranged between the positive pole column hole and the negative pole column hole, and an explosion-proof valve component is arranged in the explosion-proof valve hole.
Further, explosion-proof valve subassembly includes explosion-proof valve and explosion-proof valve protection paster, explosion-proof valve set up in the explosion-proof valve hole, explosion-proof valve protection paster set up in explosion-proof valve keeps away from on the side of plastic piece down.
Furthermore, still be provided with a plurality of bar holes on the plastic film down, it is a plurality of bar hole parallel arrangement, just the bar hole with explosion-proof valve hole corresponds the setting.
Further, the positive upper pole column, the positive lower pole column, the negative upper pole column and the negative lower pole column are square, oval or cylindrical pole columns.
Further, the positive upper pole and the positive lower pole have the same shape; the negative upper pole and the negative lower pole have the same shape. In order to ensure the sealing performance, generally, in the application, the positive upper pole and the positive lower pole generally adopt the same shape, and the negative upper pole and the negative lower pole also adopt the same shape. However, the shape of the positive electrode tab may be the same as or different from that of the negative electrode tab.
Further, the prismatic case battery includes a lithium battery and a sodium battery.
The utility model discloses the beneficial effect who reaches: the utility model discloses a set up positive pole post subassembly (negative pole post subassembly) into utmost point post and lower utmost point post two parts, utilize the utmost point post hole of top cap piece to hold partial utmost point post, can effectively reduce the inside utmost point post height with the battery outside of battery, and then effectively increase the space utilization of battery. And, through setting up insulating washer and sealing washer, leakproofness and the reliability of assurance battery structure that can be fine. In addition, the pole part of the application is formed by adopting coil material stamping, the preparation efficiency is high, and the material cost is low. The application has the advantages of simple structure, good sealing performance and low cost, and can be produced and used as a universal product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic front structural view of a top cover structure of a power battery according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of the top cover structure of the power battery in fig. 1 in the direction of AA;
fig. 3 is an exploded view of the top cover structure of the power battery of fig. 1.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
In the existing lithium battery top cap pole structure, the negative pole adopts oxygen-free red copper completely, and the copper sheet is welded on the aluminum column in a friction welding mode and then machined to be of a qualified size. In any mode, the cost is high, and the top cover is complex in structure and lacks of cost advantage; in addition, the height of the pole of the prepared top cover structure is high, the space utilization rate of the battery is reduced, the standard requirement of the test is difficult to meet, the sealing performance is poor, and the use stability of the lithium battery is easily influenced. Based on this, the utility model provides a power battery top cap structure is in order to solve above-mentioned technical problem.
Specifically, as shown in fig. 1 to 3, an embodiment of the present invention provides a top cover structure of a power battery, which is used for a square casing battery, and includes a top cover plate 10, a positive electrode pole assembly 20, a negative electrode pole assembly 30, and a lower plastic sheet 40;
two ends of the top cover plate 10 are symmetrically provided with a positive pole column hole 11 and a negative pole column hole 12; the positive pole post assembly 20 is arranged in the positive pole post hole 11, and the negative pole post assembly 30 is arranged in the negative pole post hole 12;
the top cover sheet 10 is arranged on the lower plastic sheet 40, and the top cover sheet 10 is abutted against the lower plastic sheet 40; a first hole 41 and a second hole 42 are symmetrically formed at two ends of the lower plastic sheet 40, the first hole 41 is arranged corresponding to the positive pole hole 11, and the second hole 42 is arranged corresponding to the negative pole hole 12;
the positive pole post assembly 20 comprises a positive upper pole post 21 and a positive lower pole post 22 which are arranged up and down; a first insulating washer 23 is arranged between the positive upper pole 21 and the top cover plate 10, the first insulating washer 23 is sleeved in the positive pole hole 11, and the positive upper pole 21 penetrates through the first insulating washer 23 to be connected with the positive lower pole 22 in an abutting mode; a first sealing ring 24 is arranged on the inner side surface of the first hole 41, and the first insulating gasket 23 is abutted against the first sealing ring 24; the positive lower pole column 22 penetrates through the first sealing ring 24 to be connected with the positive upper pole column 21 in an abutting mode.
In this application, through setting up anodal utmost point post into the anodal utmost point post of going up and down the utmost point post just that sets up from top to bottom, can effectively reduce the height of anodal utmost point post, and then effectively increase the space utilization of battery. Through setting up first insulating washer and first sealing washer, can guarantee the leakproofness and the reliability of structure.
Further, as shown in fig. 3, the negative electrode post assembly 30 includes a negative upper electrode post 31 and a negative lower electrode post 32 disposed up and down; a second insulating washer 33 is arranged between the negative upper pole 31 and the top cover plate 10, the second insulating washer 33 is sleeved in the negative pole hole 12, and the negative upper pole 31 passes through the second insulating washer 33 and is connected with the negative lower pole 32 in an abutting mode; a second sealing ring 34 is arranged on the inner side surface of the second hole 42, and the second insulating gasket 33 is abutted against the second sealing ring 34; the negative lower pole column 32 passes through the second sealing ring 34 to be connected with the negative upper pole column 31 in an abutting mode.
In this application, through set up negative pole post to the utmost point post and the negative pole down of the burden that sets up from top to bottom, can effectively reduce negative pole post's height, further effectively increase the space utilization of battery. Through setting up second insulating washer and second sealing washer, can guarantee the leakproofness and the reliability of structure.
Further, the positive upper pole 21 is connected with the positive lower pole 22 in a welding manner; the negative upper pole 31 and the negative lower pole 32 are connected by welding. In this application, through just going up utmost point post and just utmost point post down, utmost point post and the utmost point post welded connection under the negative, leakproofness, reliability and the stability of assurance structure that can be fine.
Further, the positive upper electrode post 21, the positive lower electrode post 22 and the negative upper electrode post 31 are all posts formed by aluminum coil stamping.
Further, the negative lower pole 32 is a pole obtained by stamping a copper-aluminum composite coil. In the application, the pole part is formed by stamping a coil material, the preparation efficiency is high, and the material cost is low.
Further, an explosion-proof valve hole 13 is arranged between the anode column hole 11 and the cathode column hole 12, and an explosion-proof valve assembly 50 is arranged in the explosion-proof valve hole 13.
Further, the explosion-proof valve assembly 50 comprises an explosion-proof valve 51 and an explosion-proof valve protection patch 52, wherein the explosion-proof valve 51 is arranged in the explosion-proof valve hole 13, and the explosion-proof valve protection patch 52 is arranged on the side face, far away from the lower plastic sheet 40, of the explosion-proof valve 51.
Further, still be provided with a plurality of bar holes 43 on the plastic piece 40 down, it is a plurality of bar hole 43 parallel arrangement, just bar hole 43 with explosion-proof valve hole 13 corresponds the setting.
Further, the positive upper pole column 21, the positive lower pole column 22, the negative upper pole column 31 and the negative lower pole column 32 are square, oval or cylindrical pole columns.
Further, the positive upper pole post 21 and the positive lower pole post 22 have the same shape; the negative upper pole 31 and the negative lower pole 32 have the same shape. In order to ensure the sealing performance, generally, in the application, the positive upper pole and the positive lower pole generally adopt the same shape, and the negative upper pole and the negative lower pole also adopt the same shape. However, the shape of the positive electrode tab may be the same as or different from that of the negative electrode tab.
Further, the prismatic case battery includes a lithium battery and a sodium battery.
In this application, insulating washer can mould plastics into the structure, also can mould plastics jointly together with last utmost point post, can reduce the degree of difficulty of structure assembly like this.
The lower plastic sheet can be processed in an injection molding mode, has higher precision and is simple and reliable in structure.
In the embodiment of the application, the anode and cathode posts are pre-assembled and positioned and then connected together by welding the upper and lower parts of the posts, and the welding mode can be one or combination of laser welding, resistance welding, friction welding and the like.
The utility model discloses a set up positive pole post subassembly (negative pole post subassembly) into utmost point post and lower utmost point post two parts, utilize the utmost point post hole of top cap piece to hold partial utmost point post, can effectively reduce the inside utmost point post height with the battery outside of battery, and then effectively increase the space utilization of battery. And, through setting up insulating washer and sealing washer, leakproofness and the reliability of assurance battery structure that can be fine. In addition, the pole part of the application is formed by adopting coil material stamping, the preparation efficiency is high, and the material cost is low. The application has the advantages of simple structure, good sealing performance and low cost, and can be produced and used as a universal product.
In the description herein, references to "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it will be understood by those skilled in the art that the specification as a whole and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (10)
1. A top cover structure of a power battery is used for a square shell battery and is characterized by comprising a top cover plate, a positive pole post assembly, a negative pole post assembly and a lower plastic sheet;
the two ends of the top cover plate are symmetrically provided with a positive pole column hole and a negative pole column hole; the anode pole post assembly is arranged in the anode pole post hole, and the cathode pole post assembly is arranged in the cathode pole post hole;
the top cover sheet is arranged on the lower plastic sheet and is abutted against the lower plastic sheet; a first hole and a second hole are symmetrically formed in two ends of the lower plastic sheet, the first hole is arranged corresponding to the positive pole column hole, and the second hole is arranged corresponding to the negative pole column hole;
the positive pole post assembly comprises a positive upper pole post and a positive lower pole post which are arranged up and down; a first insulating washer is arranged between the positive upper pole column and the top cover plate, the first insulating washer is sleeved in the positive pole column hole, and the positive upper pole column penetrates through the first insulating washer and is connected with the positive lower pole column in an abutting mode; a first sealing ring is arranged on the inner side surface of the first hole, and the first insulating gasket is abutted with the first sealing ring; the positive lower pole penetrates through the first sealing ring and is connected with the positive upper pole in an abutting mode.
2. The power battery top cap structure of claim 1, wherein the negative pole post assembly comprises a negative upper pole post and a negative lower pole post which are arranged up and down; a second insulating gasket is arranged between the negative upper pole column and the top cover plate, the second insulating gasket is sleeved in the negative pole column hole, and the negative upper pole column penetrates through the second insulating gasket and is connected with the negative lower pole column in an abutting mode; a second sealing ring is arranged on the inner side surface of the second hole, and the second insulating gasket is abutted with the second sealing ring; the negative lower pole column penetrates through the second sealing ring and is connected with the negative upper pole column in an abutting mode.
3. The power battery top cover structure according to claim 2, wherein the positive upper pole is welded to the positive lower pole; the negative upper pole column is connected with the negative lower pole column in a welding mode.
4. The power battery top cap structure of claim 3, wherein the positive upper pole, the positive lower pole and the negative upper pole are all poles punched from aluminum coil stock.
5. The power battery top cover structure of claim 4, wherein the negative lower pole is a pole stamped from a coil of copper-aluminum composite material.
6. The power battery top cover structure of claim 5, wherein an explosion-proof valve hole is arranged between the positive pole column hole and the negative pole column hole, and an explosion-proof valve component is arranged in the explosion-proof valve hole.
7. The power battery top cover structure of claim 6, wherein the explosion-proof valve assembly comprises an explosion-proof valve and an explosion-proof valve protection patch, the explosion-proof valve is disposed in the explosion-proof valve hole, and the explosion-proof valve protection patch is disposed on a side of the explosion-proof valve away from the lower plastic sheet.
8. The top cover structure of the power battery as claimed in claim 7, wherein the lower plastic sheet is further provided with a plurality of strip-shaped holes, the strip-shaped holes are arranged in parallel, and the strip-shaped holes are arranged corresponding to the explosion-proof valve holes.
9. The power battery top cap structure of claim 2, wherein the positive upper pole, the positive lower pole, the negative upper pole and the negative lower pole are square, oval or cylindrical poles.
10. The power battery top cap structure of claim 2, wherein the positive upper pole and the positive lower pole have the same shape; the negative upper pole column and the negative lower pole column have the same shape;
the square case battery includes a lithium battery and a sodium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220388252.6U CN217934003U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220388252.6U CN217934003U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217934003U true CN217934003U (en) | 2022-11-29 |
Family
ID=84147656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220388252.6U Active CN217934003U (en) | 2022-02-25 | 2022-02-25 | Power battery top cover structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217934003U (en) |
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2022
- 2022-02-25 CN CN202220388252.6U patent/CN217934003U/en active Active
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